"개와 고양이가 한국어로 대화합니다."

Translation: The dog and cat converse in Korean.

[carmenmsouza]

Just because:
Woof woof = 멍멍 
Meow = 야옹

[deactivated user]

Lol "mong mong" and "yaong" xDD

[Leejieung]

It's not "mong mong" exactly, 멍멍[mëng-mëng], 야옹[yaong]. 'ë[ʌ]' pronouns like albanian 'ë'.

[SarahMeh1]

Isn't "to speak korean" the same as "to speak IN korean" ?

[IshmaelRuf]

로 is a particle which changes the noun into a tool with/by http://www.learnkoreanlp.com/2008/08/particles_30.html?m=1

[nybo]

Like the Japanese で?

[Chanellebella]

Essentially, 　犬と猫は韓国語で話す（いぬとねこはかんこくごではなす。)

My Japanese is not the best, but this is close to it.

[KanKanMikan]

technically, it should be会話します , (i know it doesn't sounds natural)

[Soph.101]

Can someone explain why "the dog converses in Korean with the cat" is incorrect?

[MaxGrizley]

Is... "are talking in Korean" a fair translation?

[Bella987016]

말하고 있습니다 is "are talking"
대화하고 있습니다 is "are conversing"
대화합니다 is "converse"
말합니다 is "talk" or "speak"

[_MsLexi_]

What does the ru/lu ending do?

[Bella987016]

로 means using literally but it means "in" in this case. 한국어로 means "in Korean"

[eunkeum]

로 is for...?

[LoeyPark27]

That is for 'in'

[Bella_H_02]

How do you pronounce cat?

[IngeborgHa14]

Well, 고양이 is pronounced [ko.jaŋ.i], romanised /goyangi/. You can hear recordings here.